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111 lines
2.7 KiB
111 lines
2.7 KiB
/*
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* section and descriptor parser
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*
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* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
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* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef _UCSI_DVB_RST_SECTION_H
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#define _UCSI_DVB_RST_SECTION_H 1
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <libucsi/section.h>
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/**
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* dvb_rst_section structure.
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*/
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struct dvb_rst_section {
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struct section head;
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/* struct dvb_rst_status statuses[] */
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};
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/**
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* An entry in the statuses field of a dvb_rst_section structure.
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*/
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struct dvb_rst_status {
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uint16_t transport_stream_id;
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uint16_t original_network_id;
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uint16_t service_id;
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uint16_t event_id;
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EBIT2(uint8_t reserved : 5; ,
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uint8_t running_status : 3; );
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};
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/**
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* Process a dvb_rst_section.
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*
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* @param section Pointer to a generic section strcuture.
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* @return dvb_rst_section pointer, or NULL on error.
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*/
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struct dvb_rst_section *dvb_rst_section_codec(struct section *section);
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/**
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* Iterator for entries in the statuses field of a dvb_rst_section.
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*
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* @param rst dvb_rst_section pointer.
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* @param pos Variable containing a pointer to the current dvb_rst_status.
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*/
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#define dvb_rst_section_statuses_for_each(rst, pos) \
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for ((pos) = dvb_rst_section_statuses_first(rst); \
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(pos); \
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(pos) = dvb_rst_section_statuses_next(rst, pos))
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/******************************** PRIVATE CODE ********************************/
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static inline struct dvb_rst_status *
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dvb_rst_section_statuses_first(struct dvb_rst_section *rst)
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{
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size_t pos = sizeof(struct dvb_rst_section);
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if (pos >= section_length(&rst->head))
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return NULL;
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return (struct dvb_rst_status*) ((uint8_t *) rst + pos);
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}
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static inline struct dvb_rst_status *
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dvb_rst_section_statuses_next(struct dvb_rst_section * rst,
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struct dvb_rst_status * pos)
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{
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uint8_t *end = (uint8_t*) rst + section_length(&rst->head);
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uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_rst_status);
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if (next >= end)
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return NULL;
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return (struct dvb_rst_status *) next;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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